php写入、删除、复制文件及创建修改时间例子
本文章来给大家总结一个关于php写入、删除、复制文件及创建修改时间例子,有碰到此类的同学可进入参考。
例子1:
读写文件
代码如下 | 复制代码 |
$filename = 'txt/write.txt'; |
php写入文件例子2:
代码如下 | 复制代码 |
$filename = "Test\file.txt"; |
删除文件:
代码如下 | 复制代码 |
$filename = "Test\file.txt"; |
复制文件:
代码如下 | 复制代码 |
$filename1 = "Test\file.txt"; |
文件创建、修改、访问时间
实例
代码如下 | 复制代码 |
$a=filectime("log.txt"); |
PHP fileatime()函数
定义和用法
fileatime() 函数返回指定文件的上次访问时间。
该函数返回文件上次被访问的时间。如果出错则返回 false。时间以 Unix 时间戳的方式返回。
语法
fileatime(filename) filename 必需。规定要检查的文件。
提示和注释
提示:本函数的结果会被缓存。请使用 clearstatcache() 来清除缓存。
注释:文件的 atime 应该在不论何时读取了该文件中的数据块时被更改。当一个应用程序定期访问大量文件或目录时很影响性能。有些 Unix 文件系统可以在加载时关闭 atime 的更新以提高这类程序的性能。USENET 新闻组假脱机是一个常见的例子。在这种文件系统下,本函数没有用处

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